Fix debugger issues which could occur if one or more of the ajax calls used to gather execution environment info completed in an unexpected order.

To resolve this, we have callbacks from each ajax call initiate the next one so everything is guaranteed to be sequential.

Fixes #1354
Fixes #1323

web/pgadmin/tools/debugger/templates/debugger/js/direct.js

@@ -163,7 +163,6 @@ define(
               }
 
               // Call function to create and update local variables ....
-              self.GetLocalVariables(trans_id);
               self.GetStackInformation(trans_id);
             }
             else if (res.data.status === 'NotConnected') {
@@ -224,6 +223,7 @@ define(
             if (res.data.status === 'Success') {
               // Call function to create and update stack information
               self.AddStackInformation(res.data.result);
+              self.GetLocalVariables(pgTools.DirectDebug.trans_id);
             }
             else if (res.data.status === 'NotConnected') {
               Alertify.alert(
@@ -284,7 +284,6 @@ define(
 
                 // Update the stack, local variables and parameters information
                 self.GetStackInformation(trans_id);
-                self.GetLocalVariables(trans_id);
 
                 }
                 else if (!pgTools.DirectDebug.debug_type && !pgTools.DirectDebug.first_time_indirect_debug) {
@@ -312,7 +311,6 @@ define(
 
                   // Update the stack, local variables and parameters information
                   self.GetStackInformation(trans_id);
-                  self.GetLocalVariables(trans_id);
                 }
 
                 // Enable all the buttons as we got the results